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CAMBRIDGE IELTS 7 READING – TEST 1 –
ANSWERS
LET‟S GO BATS
QUESTIONS 1-5 WHICH
PARAGRAPH CONTAINS THE
FOLLOWING INFORMATION
1. EXAMPLES OF WILDLIFE OTHER THAN BATS WHICH DO NOT RELY
ON VISION TO NAVIGATE BY
Keywords: examples,other than bats, not rely on vision
In paragraph B, the writer states : ” …How to find their way and find their prey in the absence of
light.Bats are not the only creatures to face this difficulty today.Obviously….” Then
the writer lists
some names of insects and fishes in the following sentences.
– navigate = find their way ,find their prey : to make or find a course or way/ find position/ direction
you need to go
– in the absence of light = do not rely on vision
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– other than bats = bats are not the only
– other than = except/ different from
=> ANSWER: B
2. HOW EARLY MAMMALS AVOIDED DYING OUT
Keywords : how, mammals, avoided dying
In
paragraph A, the writer says : “It is probable that the nocturnal trades go way back in the ancestry of
all mammals. In the time when …, our mammalian ancestors probably only managed to survive at all
because they found ways of scraping a living at night” It can be inferred that finding ways of scraping
a living at night is how early mammals avoided dying out – early mammals = our mammalian
ancestors
– avoided dying out= managed to survive
– scraping a living=just finding enough
food to eat and survive
=> ANSWER: A
3. WHY BATS HUNT IN THE DARK
Keywords: Why, hunt, dark
In paragraph A, the writer argues : ” They hunt at night,and cannot use light to help them…You might
say that this is a problem of their own making, one that they could avoid…. But the daytime economy
is already heavily exploited by other creatures such as birds” This explains that bats hunt in the dark
due to the “heavily exploited economy” during the daytime when, for example, birds catch insects.
– in the dark=at
night
=> ANSWER: A
4. HOW A PARTICULAR DISCOVERY HAS HELPED OUR
UNDERSTANDING OF BATS
Keywords : how, discovery, understanding of bats
In paragraph E, the writer explains : ” But the underlying mathematical theories of radar and sonar are
very similar, and much of our scientific understanding of the details of what bats are doing has come
from applying radar theory to them.
The American zoologist, Donald Griffin, who was largely
responsible for the discovery of sonar in bats, coined the term „echolocation‟ to cover both sonar and
radar…” This means that radar theory helped our understanding of bats.
=> ANSWER: E
5. EARLY MILITARY USES OF ECHOLOCATION
Key words: military uses, echolocation
In paragraph D, the writer says : ” After this
technique had been invented, it was only a matter of time
before weapons designers adapted it for the detection of submarines. Both sides in the Second World
Warrelied heavily on these devices, under such codenames as Asdic (British) and Sonar…, which uses
radio echoes rather than sound echoes.” This means that devices using radio echoes were used for
military purposes, as they served in a war. The term „echolocation‟ was
not known to the early
pioneers, and was invented later, as the final paragraph explains.
=> ANSWER: D
QUESTIONS 6-9 COMPLETE THE SUMMARY
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